Dense Fog Advisory 03/04/2026 19:50 Illinois, Indiana

Headline: 
Dense Fog Advisory issued March 4 at 9:50PM CST until March 5 at 3:00PM CST by NWS Chicago IL
Event: 
Dense Fog Advisory
Urgency: 
Expected
Effective: 
March 4, 2026 - 7:50pm
Expires: 
March 5, 2026 - 6:00am
Description: 
* WHAT...Visibility of one quarter mile or less in dense fog expected. * WHERE...In Illinois, Central Cook, DuPage, Lake IL, Northern Cook, and Southern Cook Counties. In Indiana, Lake IN and Porter Counties. * WHEN...Until 3 PM CST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.
Instruction: 
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Area Description: 
Lake; DuPage; Northern Cook; Central Cook; Southern Cook; Lake; Porter
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov